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Princeton

Oxygen starved Pacific Ocean chart

Pacific Ocean’s oxygen-starved ‘OMZ’ is growing, new Princeton research finds

Brain illustration

Direct Evidence of Disrupted Serotonin Release in Depressed Brains

image: Neutron star merger and the gravity waves it produces

New tool allows scientists to peer inside neutron stars

Life expectancy drops for Native Americans due to COVID-19

A team of Princeton researchers has now discovered clear evidence that Megalodon and some of its ancestors were at the very highest rung of the prehistoric food chain – the highest “trophic level.” Indeed, their trophic signature is so high that they must have eaten other predators and predators-of-predators in complicated food web, say the researchers. Harry Maisch of Florida Gulf Coast University, whose hand is holding this Megalodon tooth, gathered many of the samples used in this analysis and is a co-author on the new paper in Science Advances.

What did Megalodon eat? Anything it wanted

Fernanda, the only known living Fernandina giant tortoise (Chelonoidis phantasticus, or “fantastic giant tortoise”), now lives at the Galápagos National Park's Giant Tortoise Breeding Center on Santa Cruz Island. Fernanda, named after her Fernandina Island home, is the first of her species identified in more than a century. Princeton geneticist Stephen Gaughran successfully extracted DNA from a specimen collected from the same island more than a century ago and confirmed that Fernanda and the museum specimen are members of the same species and genetically distinct from all other Galápagos tortoises.

‘Fantastic giant tortoise,’ believed extinct, confirmed alive in the Galápagos

Princeton University researchers reported that unless greenhouse gas emissions are curbed, marine biodiversity could be on track to plummet to levels not seen since the extinction of the dinosaurs. The study authors modeled future marine biodiversity under projected climate scenarios and found that species such as dolphinfish (shown) would be imperiled as warming oceans decrease the ocean’s oxygen supply while increasing marine life’s metabolic demand for it.

Unless climate change is curbed, mass extinction in oceans is likely — Princeton

What do you see when you listen to music?

man on piggybank

Princeton will significantly increase stipends to support graduate students

What is your dog’s lifespan?

Borrowing from a humble lizard to build artificial lungs

Borrowing from a humble lizard to build artificial lungs

Abstract illustration of diversity

Like a natural system, democracy faces collapse as polarization leads to loss of diversity

New cancer therapy holds potential to switch off major cancer types without side effects

Researchers shrink camera to the size of a salt grain

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